1. Department of Gynecology and Obstetrics, Center of Reproductive Medicine, The West China Second University Hospital, Sichuan University, Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, Chengdu, China
2. Department of Gynecology and Obstetrics, The West China Second University Hospital, Sichuan University, Chengdu, China
3. Laboratory of Molecular and Translational Medicine, West China Institute of Women and Children’s Health, The West China Second University Hospital, Sichuan University, Chengdu, China
4. National Office for Maternal and Child Health Surveillance of China, Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), The West China Second University Hospital, Sichuan University, Ministry of Education, Chengdu, China
5. Department of Pathology, The West China Second University Hospital, Sichuan University, Chengdu, China